American Express: Cell-Based Architecture for Resilient Payment Systems

American Express has implemented a cell-based architecture for its core payments platform that isolates failures within defined boundaries, enabling independent operation of each cell without cascading failures across the system. This design approach reduces failure blast radius, maintains low latency through data locality, and improves scalability while supporting mission-critical transaction processing at global scale. For IT organizations, this architecture pattern demonstrates how to balance resilience and availability requirements against operational complexity through careful isolation of services, data, and infrastructure.